Draft-equalizer.



No. 764,087. PATBNTED JULY 5, 1904. 0. A. & W. A. WESTERSON. DRAFT EQUALIZER.

APPLICATION FILED PEB.18, 1904.

N0 MODEL.

UNITED STATES Patented July 5, 1904.

PATENT Orrrcn.

OSCAR A. VESTERSON, OF CANNON FALLS, AND \VILLIAM A. VESTERSON, OF MINNEAPOLIS, MlNNESOTA.

DRAFT-EQUALIZER.

SPECIFICATION forming part of Letters Paten N0. 764,087, dated July 5, 1904.

Application filed February 18, 1904. Serial No. 194,151. (No model.)

To (all whom it may concern:

Be it known that we, OSCAR A. nsTERsoN, residing at Oannon Falls, in the county of Goodhue, and l/VILLIAM A. WnsTERsoN, resid- 5 ing at Minneapolis, in the county of Hennepin, State of Minnesota, citizens of the United States, have invented certain new and useful Improvements in Draft-Equalizers; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to draft-equalizers, and has for its object to improve the same in the several particulars hereinafter mentioned.

To the above ends the invention consists of the novel devices and combinations of devices hereinafter described, and defined in the claims.

The invention is illustrated'in the accompanying drawings, wherein like characters indi cate like parts throughout the several views.

Figure 1 is a plan view showing our improved draft-equalizer in the form of a fourhorse evener applied to a pole, such as the pole of a harvester. Fig. 2 is a transverse vertical section on the line of Fig. 1, some parts being removed; and Fig. 3 is asection on the line a! re" of Fig. 1, some parts be ing removed.

The numeral 1 indicates the pole. The numeral 2 indicates the primary equalizingbeam, the numeral 3 the two-horse eveners, and the numeral 1 the whiflletrees of the fourhorse evener, these elements being connected in the usual or any suitable way.

The number 5 indicates the tugs, shown as connected to the whifiietrees 4: in the usual way.

The equalizing-beam 2 is pivoted at its central portion to an oscillating" arm 6, which at its inner end is pivoted to the pole by a nutted bolt 7 and is preferably provided with an under side reinforcing-strap 8, which moves pivotally therewith.

The numeral 9 indicates a sheave-supporting bracket which is equipped at its ends with guide-sheaves 10. This bracket 9 at its intermediate portion is slotted at 11 and is rigidly but adjustably secured on top of the pole back of the oscillating arm 6 by means of a yoke 12. This yoke 12 embraces the pole, and its ends project through the slot 11 of the bracket 9 and are provided With nuts 13, which when tightened iirmly clamp the said bracket against the said pole, but when loosened permit endwise adjustments of the said bracket transversely of the pole. Pivotally mounted on the pole back of the bracket 9 is a third guide-sheave 14:. A flexible connection, such as a Wire rope or chain 15, extends over the rear portion of the sheave 14 and over the left-hand side of the sheaves 10, and its ends are attached one to each end of the equalizing-beam 2. By adjustments of the bracket 9 such an amount of the slack of the connection 15 should be taken up that the arm 6 will stand approximately at a right angle to the pole. moving forward only by the tension of the rope or connection 15 and as the forward movement of the said connection is resisted by the sheave 14, it is evident that the draft strain will come upon this sheave 14. The connection 15 is, however, free to travel over the said sheave 1 1 and over the sheaves 10, so as to permit free vibratory movements of the equalizing-beam 2. hen the said connection 15 is subjected to draft strains, it exerts a lateral pressure on the sheaves 10 and bracket 9, tending to force the pole toward the right and neutralize the tendency of the pole to be moved toward theleft, which latter tendency is due to the fact that the equalizingbeam 2 is pivoted at a point offset from the said pole.

WVhile a four-horse draft-equalizer is illustrated in the accompanying drawings, it will of course be understood that the principles of construction above described may be applied to draft-equalizers in which either a greater or less number of horses are to be attached, such as three-horse equalizers or six-horse equalizers. It will also beunderstood that Since this arm 6 is prevented from the device described is capable of other modifications within the scope of our invention as herein set forth and claimed.

/Vhat we claim, and desire to secure by Letters Patent of the United States, is as follows:

1. The combination with a pole having an offset arm pivoted thereto, of a draft-equalizing device having its equalizing-beam pivoted to said offset arm, a guide-sheave mounted on said pole, at the rear of said arm, a bracket secured to said pole between said arm and said sheave, guide-sheaves mounted on said bracket, one on each side of the said pole, and a flexible draft connection attached at its ends to said equalizing-beam, passed over the rear portion of the guide-sheave on the pole, and passed over two guide-sheaves on said bracket, on the same sides thereof, whereby the side thrust on said bracket is applied in the same direction through both guide-sheaves, substantially as described.

2. The combination with a pole and an off set armG pivoted thereto, of a draft-equalizer, involving an equalizing-beam 2 pivoted to the free end of said arm 6, the bracket 9 rigidlg and adjustably secured to said pole, the guidesheaves 10 mounted on the ends of said bracket, the sheave lt mounted on said pole at the rear of said bracket, and a flexible draft connection 15, attached at its ends to the ends of said equalizing-beam 2 and passed over the same sides of the said two sheaves 10, and over the rear side of said sheave 14, substantially as and for the purposes set forth.

In testimony whereof we aflix our signatures in presence of two witnesses.

OSCAR A. WVEQTERSON. WILLIAM A. W ESTERSON.

\Vitnesses:

A. H. OlSAHL,

F. 1). MERCHANT. 

